The internet observatory reported that earlier this week, over 75 per cent of the country had gone offline, excluding autonomous regions which operate their own networks.
According to Mustafa Saadun, the head of the Iraqi Observatory for Human Rights, 450 people were detained and half of them were later released.
"Seventy-three people were killed, and about 3,000 were injured since the beginning of the clashes with security forces. Most of those killed and injured are from Baghdad and Dhi Qar province", Saadun said, adding that Friday was the "bloodiest" day of protests.
On Thursday, the authorities introduced a curfew in Baghdad and later expanded the restrictions to other cities and provinces. People that joined the rallies demanded the resignation of the government, new jobs, economic reforms and measures against corruption.
The recent rallies erupted a year after large-scale protests against low living standards rocked Iraq's south, particularly, the city of Basra.